Dinosaur bodies are covered in all sorts of spikes, horns, plates that were used for defence, combat and identification. But sometimes, these body parts are so bizarre that their purpose is a mystery. The latest in these strange projections belongs to Concavenator, a new giant predator with two spikes sticking up from the vertebrae just in front of its hips. They would probably have given the dinosaur a strange hump on its back.

Method of load transfer to hips to reduce stress on tail and abdominal vertebrae?
A possible clue to its behaviour?

http://www.everythingdinosaur.com Mike Walley

As Professor Benton (Bristol University), said this is one “weird” dinosaur. The short crest is interesting for sure, when one considers the potential implications for Becklespinax and Acrocanthosaurus, but the paper also suggested that the ulna showed evidence of quill knobs. A feathered Allosauroidea – what every next?

http://bimotagrrrl.spaces.live.com/ BimotaGrrrl

the spikes look like the top supports over the footings in a long spanning bridge.